Respuesta :

jcherry99

Answer:

Step-by-step explanation:

Pythagorean Theorem

c^2 = a^2 + b^2

a = 20

b = 15

c = ?

c^2 = 20^2 + 15^2

c^2 = 400 + 225

c^2 = 625                    Take the square root of both sides.

√c^2 = √625

c = 25

The third side is 25 cm long.

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